Bolt cushioning device



y 1939- H. o. EIANE 2,165,093

I BOLT CUSHIONING DEVICE Filed Aug. 4, 195a INVENTOR.

UNITED AENT orrls BOLT CUSHIONING DEVICE Halvor Olsen Eiane, WashingtonIsland, Wis.

Application August 4, 1938, Serial No. 223,020 In Canada August 6, 19372 Claims. (01. 42-1) My invention relates to improvements in breech Thewooden plug 3 is made of hardwood with mechanism of automatic fire-armsand relates the grains lengthwise and driven tight into its particularlyto my earlier invention of an Autosocket in the bolt handle 2. maticrifle, on which application for patent was Previous to insertion in thesocket of the bolt 5 filed June 1, 1936, Serial No. 82,811, in which ahandle 2, the plug 3 is first soaked in thin nonbolt handle is used formanipulation of the breech gumming oil which by reason of friction inthe bolt for insertion of the initial cartridge into the numerous thinpores in the wood produce a very cartridge chamber and for similarfunctions, efiicient shock absorbing medium, and at the etc., and theobjects of my improvements are; same time prevents crystallization ofthe metallic first, to reduce to a minimum the tendency of partsconcerned.

the bolt handle to rebound when operated by While the primary object ofthe present invenautomatic means; second, to prevent crystallization isfor use in my earlier invention heretofore tion of the metal in the bolthandle and breech referred to, the invention is none the less suitboltby cushioning the abrupt stop of the bolt able for any automatic gunmechanism in which handle when brought in contact with a receiver a bolthandle rotates with the breech bolt, irreof a gun by means of a woodenplug giving the spective of shape or size.

same efiect as produced by a wooden mallet strik- Having thus describedmy invention, what I ing against an object of steel or iron. claim asnew and desire to secure by Letters I attain these objects by the use ofa wooden Patent is: plug hereinafter more fully described and 1. In abreech bolt for an automatic fire-arm, a

claimed having reference to the accompanying bolt-handle projecting fromsaid breech-bolt, said drawing, in which: Fig, 1 is a longitudinal sidebreech-bolt adapted for longitudinal and rotary view of a breech boltwith the bolt handle raised movements, a socket hole bored into saidboltin vertical position and showing location of the h nd e o t e nd s ee of a a ja hion plug. Fig. 2 is a rear end view of the to thebreech-bolt, a wooden plug inserted into 25 breech bolt with its bolthandle turned down and Sa d S e d Wo P 8 d pt to Cushion showing bydotted lines location and shape of the force of the rotary blow of saidbolt-handle plug and its socket in the bolt handle. and breech-bolt whenbrought to an abrupt stop A in Figs. 1 and 2 is the breech bolt in deaain t a receiver of a fire-arm. n tached relation, such as used in myautomatic 2. In a breech-bolt for an automatic fire-arm,

rifle, shown and described in the aforementioned a bolt-handleprojecting from said breech-bolt, application for patent. 2 in Figs. 1and 2 is the said breech-bolt adapted for longitudinal and robolthandle, used for manipulating the bolt in tary movements, a socket boredinto said boltthe operation of loading an initial cartridge into handlefrom the underside thereof and adjacent a cartridge chamber of a gun,etc. to the breech-bolt, a Wooden plug inserted into 35 3 is the cushionplug, shown endwise in Fig. 1, said socket, said wooden plug soaked inthin nonwhich is adapted to strike against a flat faced summi Oil d ptet a e f t W le mOV- seat in the receiver of applicants automatic rifle,ing unde a b ow t o the numerous pores in heretofore referred to. thewood of said plug whereby shock-absorbing The face of the plug 3 extendsslightly beyond qualities are produced to absorb the force of the 4 theoutlines of the bolt handle 2, as shown in Fig. rotary movement of saidbolt-handle and breech- 2, and thus prevents metal from striking againstb t Wh brought to an abrupt p a st e metal and thereby reduces thetendency of the receiver on a fire-arm whereby the tendency of bolthandle 2 to rebound when brought to an the bolt-handle to rebound isreduced to a miniabrupt stop in its automatic closing operation. mum. 45The dotted lines 4 in Fig. 2, indicate the shape HALVOR OLSEN EIANE. andlength of the wooden plug 3, as well as the socket into which the plugis inserted.

